- Industry: Aviation
- Number of terms: 16387
- Number of blossaries: 0
- Company Profile:
Aviation Supplies & Academics, Inc. (ASA) develops and markets aviation supplies, software, and books for pilots, flight instructors, flight engineers, airline professionals, air traffic controllers, flight attendants, aviation technicians and enthusiasts. Established in 1947, ASA also provides ...
An electrical circuit that contains resistance, inductance, and capacitance.
Industry:Aviation
An electrical circuit that does not contain any source of electrical energy. A passive circuit depends upon an active circuit for its power.
Industry:Aviation
An electrical circuit that is not energized— not connected to a source of electrical power.
Industry:Aviation
An electrical circuit used to control other circuits in an electrical device or system. Control circuits include sensors and measuring devices. The output current in a control circuit is low, usually just enough to actuate the devices that control the main load current of the device or system.
Industry:Aviation
An electrical circuit used to match the input impedance of an electrical load to the output impedance of a power circuit, such as an amplifier.
Industry:Aviation
An electrical circuit using the ground or the structure of a vehicle as one of its conductors. Almost all automobiles and aircraft use ground-return electrical systems. One of the terminals of the battery, usually the negative terminal, is connected directly to the framework of the vehicle.
One wire is used to connect the components to the positive terminal of the battery, and another wire connects the component to the structure. The return current from the component flows back to the battery through the structure.
Industry:Aviation
An electrical component made of two conductors separated by an insulator, or dielectric. A capacitor can store an electrical charge in an electrostatic field. The capacitance of a capacitor is measured in farads, microfarads (10-6 farad), or picofarads (10-12 farad).
The capacitance of a capacitor is determined by three things: the area of the plates, the amount of separation between the plates, and the kind of insulating material, or dielectric, between the plates. Capacitors were at one time called condensers.
Industry:Aviation
An electrical component that can control current or voltage for switching or amplification. Vacuum tubes, transistors, and magnetic amplifiers are active components.
Industry:Aviation
An electrical component that opens a circuit any time excessive current flows. A magnetic field is produced by current flowing through the circuit breaker, and the strength of the field is proportional to the amount of current. When more current flows through the circuit breaker than it is rated to carry, the magnetic field becomes strong enough to snap open a set of contacts and break, or open, the circuit.
Industry:Aviation
An electrical component used to change the voltage and current in an alternating current circuit. The core of a transformer is made of a stack of soft iron laminations, and the windings, which consist of several coils of insulated wire, are wound around the core. The winding connected to the power source is called the primary winding, and the windings connected to the electrical loads are called secondary windings.
The voltage difference between that across the primary winding and that across any one of the secondary windings is directly proportional to the ratio of the number of turns in the secondary winding to the number of turns in the primary winding. The higher the ratio, the higher the secondary voltage.
The current difference between that in the primary winding and that in the secondary winding is inversely proportional to the ratio of the number of turns in the secondary winding to the number of turns in the primary winding. The higher the ratio, the lower the secondary current.
Industry:Aviation
